Argon

Argon (Ar)

chemical element with symbol Ar and atomic number 18; rare gas
Atomic Number18
Atomic Weight39.948
Hejmara baristeyî40
Group18
Period3
Blockp
Proton18 p+
Notron22 n0
Kareva18 e-
Animated Bohr model of Ar (Argon)

Physical Property

Atomic Radius
71 pm
molar volume
Covalent Radius
96 pm
Metallic Radius
ionic radius
Crystal Radius
Van der Waals radius
188 pm
density
0,001633 g/cm³
Atomic Radii Of The Elements: Argon0102030405060708090100110120130140150160170180190pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

wize
proton affinity
369,2 kJ/mol
electron affinity
ionization energy
15,7596112 eV/particle
ionization energy of Ar (Argon)
enthalpy of vaporization
6,52 kJ/mol
enthalpy of fusion
standard enthalpy of formation
Kareva
electron shell2, 8, 8
Bohr model: Ar (Argon)
valence electron8
Lewis structure: Ar (Argon)
electron configuration[Ne] 3s2 3p6
1s2 2s2 2p6 3s2 3p6
Enhanced Bohr model of Ar (Argon)
Orbital Diagram of Ar (Argon)
oxidation number0
electronegativity
Electrophilicity Index
0,0832013314590371 eV/particle
fundamental state of matter
phase of matterGas
gaseous state of matterMonoatomic
Boiling Point
87,302 K
Melting Point
83,81 K
critical pressure
4,863 MPa
critical temperature
150,687 K
triple point
83,8058 K
68,89 kPa
appearance
color
Colorless
appearancecolorless gas exhibiting a lilac/violet glow when placed in a high voltage electric field
refractive index
1,000281
thermodynamic material property
Thermal Conductivity
0,0177 W/(m K)
thermal expansion
molar heat capacity
20,786 J/(mol K)
Specific Heat Capacity
heat capacity ratio5/3
electrical properties
type
electrical conductivity
electrical resistivity
superconductivity
magnetism
typediamagnetic
magnetic susceptibility (Mass)
-0,000000006 m³/Kg
magnetic susceptibility (Molar)
-0,00000000024 m³/mol
magnetic susceptibility (Volume)
-0,0000000107
magnetic ordering
Germahiya Curie
Néel temperature
pêkhate
Crystal StructureFace Centered Cubic (FCC)
lattice constant
5,26 Å
Lattice Anglesπ/2, π/2, π/2
mechanical property
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
Leza dengê
319 m/s
classification
CategoryNoble gases, Noble gases
CAS GroupVIII
IUPAC GroupVIIIA
Glawe Number3
Mendeleev Number114
Pettifor Number3
Geochemical Classvolatile
Goldschmidt classificationatmophile

other

Gas Basicity
346,3 kJ/mol
polarizability
11,083 ± 0,007 a₀
C6 Dispersion Coefficient
64,2 a₀
allotrope
Neutron cross section
0,66
Neutron Mass Absorption
0,00059
quantum number1S0
space group225 (Fm_3m)

Isotopes of Argon

Stable Isotopes2
Unstable Isotopes24
Natural Isotopes3
Isotopic Composition4099.60%4099.60%360.33%360.33%380.06%380.06%

29Ar

Hejmara baristeyî29
neutron number11
Giraniya atomê
29,040761 ± 0,000471 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin5/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê2018
parity+

decay modeintensity
2p (2-proton emission)100%

30Ar

Hejmara baristeyî30
neutron number12
Giraniya atomê
30,023694 ± 0,000192 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê2015
parity+

decay modeintensity
2p (2-proton emission)100%

31Ar

Hejmara baristeyî31
neutron number13
Giraniya atomê
31,012158 ± 0,000215 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
15 ± 0,3 ms
spin5/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1986
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)68.3%
2p (2-proton emission)9%
B+pA0.38%
3p0.07%
β+α (β+-delayed α emission)0.03%
2p (2-proton emission)0.0006%

32Ar

Hejmara baristeyî32
neutron number14
Giraniya atomê
31,997637824 ± 0,0000019 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
98 ± 2 ms
spin0
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê1977
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)35.58%

33Ar

Hejmara baristeyî33
neutron number15
Giraniya atomê
32,989925545 ± 0,00000043 Da
g-factor
-1,446 ± 0,012
natural abundance
radioactivity☢️ radioactive element
half-life
173 ± 2 ms
spin1/2
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê1964
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)38.7%

34Ar

Hejmara baristeyî34
neutron number16
Giraniya atomê
33,980270092 ± 0,000000083 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
846,46 ± 0,35 ms
spin0
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê1966
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

35Ar

Hejmara baristeyî35
neutron number17
Giraniya atomê
34,975257719 ± 0,00000073 Da
g-factor
0,42133333333333 ± 0,00013333333333333
natural abundance
radioactivity☢️ radioactive element
half-life
1,7756 ± 0,001 s
spin3/2
nuclear quadrupole moment
-0,084 ± 0,015
dema îcadkirinê yan keşfê1940
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

36Ar

Hejmara baristeyî36
neutron number18
Giraniya atomê
35,967545106 ± 0,000000028 Da
g-factor
0
natural abundance
0,3336 ± 0,021
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê1920
parity+

decay modeintensity
+ (double β+ decay)

37Ar

Hejmara baristeyî37
neutron number19
Giraniya atomê
36,966776301 ± 0,000000221 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
35,011 ± 0,019 d
spin3/2
nuclear quadrupole moment
0,076 ± 0,003
dema îcadkirinê yan keşfê1941
parity+

decay modeintensity
ϵ (electron capture)100%

38Ar

Hejmara baristeyî38
neutron number20
Giraniya atomê
37,962732102 ± 0,000000209 Da
g-factor
0
natural abundance
0,0629 ± 0,007
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê1934
parity+

39Ar

Hejmara baristeyî39
neutron number21
Giraniya atomê
38,964313037 ± 0,000005367 Da
g-factor
-0,45428571428571 ± 0,0042857142857143
natural abundance
radioactivity☢️ radioactive element
half-life
268 ± 8 y
spin7/2
nuclear quadrupole moment
-0,116 ± 0,002
dema îcadkirinê yan keşfê1950
parity-

decay modeintensity
β (β decay)100%

40Ar

Hejmara baristeyî40
neutron number22
Giraniya atomê
39,96238312204 ± 0,00000000234 Da
g-factor
0
natural abundance
99,6035 ± 0,025
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê1920
parity+

41Ar

Hejmara baristeyî41
neutron number23
Giraniya atomê
40,96450057 ± 0,000000372 Da
g-factor
-0,37428571428571 ± 0,0022857142857143
natural abundance
radioactivity☢️ radioactive element
half-life
109,61 ± 0,04 m
spin7/2
nuclear quadrupole moment
-0,042 ± 0,004
dema îcadkirinê yan keşfê1936
parity-

decay modeintensity
β (β decay)100%

42Ar

Hejmara baristeyî42
neutron number24
Giraniya atomê
41,963045737 ± 0,0000062 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
32,9 ± 1,1 y
spin0
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê1952
parity+

decay modeintensity
β (β decay)100%

43Ar

Hejmara baristeyî43
neutron number25
Giraniya atomê
42,965636056 ± 0,0000057 Da
g-factor
-0,4088 ± 0,0024
natural abundance
radioactivity☢️ radioactive element
half-life
5,37 ± 0,06 m
spin5/2
nuclear quadrupole moment
0,142 ± 0,014
dema îcadkirinê yan keşfê1969
parity

decay modeintensity
β (β decay)100%

44Ar

Hejmara baristeyî44
neutron number26
Giraniya atomê
43,964923814 ± 0,0000017 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
11,87 ± 0,05 m
spin0
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê1969
parity+

decay modeintensity
β (β decay)100%

45Ar

Hejmara baristeyî45
neutron number27
Giraniya atomê
44,968039731 ± 0,00000055 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
21,48 ± 0,15 s
spin5/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1974
parity-

decay modeintensity
β (β decay)100%

46Ar

Hejmara baristeyî46
neutron number28
Giraniya atomê
45,968039244 ± 0,0000025 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
8,4 ± 0,6 s
spin0
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê1974
parity+

decay modeintensity
β (β decay)100%

47Ar

Hejmara baristeyî47
neutron number29
Giraniya atomê
46,972767112 ± 0,0000013 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1,23 ± 0,03 s
spin3/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1985
parity

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)0.2%

48Ar

Hejmara baristeyî48
neutron number30
Giraniya atomê
47,976001 ± 0,000018 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
415 ± 15 ms
spin0
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê2004
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)38%

49Ar

Hejmara baristeyî49
neutron number31
Giraniya atomê
48,981685 ± 0,000429 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
236 ± 8 ms
spin3/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1989
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)29%
2n (2-neutron emission)

50Ar

Hejmara baristeyî50
neutron number32
Giraniya atomê
49,985797 ± 0,000537 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
106 ± 6 ms
spin0
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê1989
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)37%
2n (2-neutron emission)

51Ar

Hejmara baristeyî51
neutron number33
Giraniya atomê
50,993033 ± 0,000429 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin1/2
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê1989
parity-

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

52Ar

Hejmara baristeyî52
neutron number34
Giraniya atomê
51,998519 ± 0,000644 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê2009
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

53Ar

Hejmara baristeyî53
neutron number35
Giraniya atomê
53,00729 ± 0,00075 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin5/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê2009
parity-

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

54Ar

Hejmara baristeyî54
neutron number36
Giraniya atomê
54,013484 ± 0,000859 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê2018
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)
Argon ice 1

dîrok

kaşîf an îcadkerSir William Ramsey, Baron Rayleigh
location of discoveryScotland
dema îcadkirinê yan keşfê1894
BêjenasîGreek: argos (inactive).
pronunciationAR-gon (îngilîzî)

source

Abundance
Abundance in Earth's crust
3,5 mg/kg
natural abundance (Okyanûs)
0,45 mg/L
natural abundance (human body)
natural abundance (meteoroid)
natural abundance (Roj)
0,007 %
Abundance in Universe
0,02 %

Nuclear Screening Constants

1s0.4925
2p3.9918
2s5.7696
3p11.2359
3s10.2432